feat: icon-only toolbar, versioning fixes, history modal, PanelRight repositioning

- Toolbar: remove text labels from all icon buttons (AI, Save, Preview, Convert)
  all buttons now icon-only with title tooltip for accessibility
- Toolbar: reposition PanelRight (info panel toggle) to far right after three-dot menu
- Versioning: decouple getNoteHistory/restoreNoteVersion from global userAISettings.noteHistory
  now checks note.historyEnabled directly — unblocks manual per-note history
- Versioning: add 'Sauvegarder cette version' button in Versions tab of info panel
  calls commitNoteHistory with visual feedback (spinner → success state)
- note-document-info-panel: import commitNoteHistory, add isSavingVersion state
- notes.ts: fix double guard that silently blocked all history operations

memento-note/scripts/setup-env.js

@@ -294,7 +294,7 @@ async function chooseEnvironment() {
 // ---------------------------------------------------------------------------
 // AI provider menus
 // ---------------------------------------------------------------------------
-const AI_PROVIDERS = ['openai', 'ollama', 'deepseek', 'openrouter', 'custom-openai'];
+const AI_PROVIDERS = ['openai', 'anthropic', 'anthropic_custom', 'ollama', 'deepseek', 'openrouter', 'custom-openai'];
 
 function showAiProviderMenu(label) {
   console.log();